There is a regular rhythm at a rate of 48 beats/min. The QRS complex duration is normal (0.08 sec), with a normal morphology and axis between 0° and 90° (positive QRS complex in leads I and aVF). The ...
Indications for cardiac-resynchronization therapy (CRT) in patients with heart failure include a prolonged QRS interval (≥120 msec), in addition to other functional criteria. Some patients with narrow ...
The correct answer is sinus pause due to sinus node exit block. The rhythm is regular at a rate of 80 beats/min, although two long RR intervals (└┘) with a rate of 40 beats/min are present in the ...
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